Improved paint for ships



CEZZA To all whom it may concern:

Be it known that I, DAVID PARKHURST, of 7 Gloucester, in the county ofEssex, State of Massachusetts, haveinvented an Improvement in Paint forShips Bottoms; and I do herebydeola-re that the following is a full,clear, and exact description thereof, and mode of making the same. Theobject of my invention is to prevent the -r unit se se; Mathis Ift'ectby means of my improvement in paint, 7 which is applied with a brush inthe ordinary 1 .1 manner.

The basis of my'invention consists in the combination or mixture ofregulus of m e tallic 'i-gcoppewhi tp arsenic-a1 ox'iglgf eopp e rpand awery heavy kind of lirojn ooher or oxide of iron mixed with tar ortaFoil. NapTtba will do instead'ol' tar-oil.

' j In order to make this paint, first, into a tank of suitable sizeL-pour of common vegetable iar, forty gallons; of tar-oil, (naphtha will(10,) twenty-five gallons. us mixture should be allowed to stand abouttwenty-fourhours, covered closely. This is to allow a sediment to s. bedeposited, consisting of impurities and such heavy substances as are notsoluble in the mixture. The liquid is then drawn 0E into another vat,when thirty-five gallons of the dry is-a'd'ded, and after beingwe is fitfor use. r

The dry powder which I-add to the liquid is, for ships of woodenbottoms, prepared in the Q 4 k i 4/8,583 1 UNITED STATES PATENT OFF-ICE.

I Davin ranxuuasr, or eLoo'onsrnn tassaonusntrrs. 1,

IMPRQVED PAINT FOR sH P'sz.. B oT roMs.

' Specification forming part of Letters Patent No. Isles-s, dated July4, i865.

" pulverized brgwn ochero ide of iron is added a mixture 0 metalliccopper, twenty galfouling of ships bottoms by the aglli'fisijojfffoffArsenioal oxide gf gp pper is used to kill the mixture of irgp and c'opper, finely pulverized.

l1 stirred the paint lons,themetallic copper ant arsenical oxide toexist in equal parts in the mixture. For ships of iron bottoms the paintis composed of a mixture of twenty gallons of tar-oil and forty galionsof vegetable tar, with a dry composition of thirty gallons of oxide ofiron mixed with ten gallonsof arsenicaloxide of co ,1

By experimen ave ound that paint prepared in this way protects thebottoms of vessels from becoming foul more effectually and for a longerperiod than any other now used for that purpose. When so prepared thepaint is very adhesive, and may be applied to the bulls of vessels inthe ordinary manner. The tar is used instead of oil, so as not toincrust and form a hard surface on the vessels bottom. Tar-oil ornaphtha or benzine is used to thin the tar, so that it can be used witha brush.

shelf-fish and worms which destroy'the plank on the vessels bottom. Ironis used to prevent the grass and weeds from growing. Copper is used tooxidize the iron, so as to make it gradually wash from the plank toprevent the grass and weeds from growing on it. e What Iclaim, anddesire to secure by Letters Patent, is- .w The composition preparedsubstantially as f hereinbefore setfortb,and fbrthepurposospecified.DAVID PARKHURST.

Witnesses: A v

It. H. EDDY,

' following manner: To twenty I H. E. FISHER.

